India’s aviation ministry said Sunday that an Air India pilot whose flight plunged dramatically in turbulence, injuring 17 passengers and crew is undergoing a “confirmatory” psychoactive drug test. The Airbus A320, carrying 137 passengers and eight crew, lost around 300 feet (91 metres) on August 4 while flying from Phuket in Thailand to New Delhi, before stabilising and landing safely, the civil aviation ministry said. Eight passengers and four cabin crew members were admitted to hospitals...